You can change the tags of the game on the My Games page. This the page with the list of your games when you just click on the Games header or the My Games option in the banner that drops down when you hover over the Games header. There are little Xs on the tags to delete them. As far as the game size goes, people with large games have had issues in the past due the server timing out during the copy process causing it to fail. Since we don't have any idea how large our games actually are, and I expect how much data the servers can handle for the copy function probably changes as tech changes, I don't expect we will have real transparency on that aspect of our games for a while. But, that is why people will ask how large/cluttered your game is when something like this comes up. I didn't know about certain characters in the tags breaking that function, so it is certainly something I will keep in mind if that turns out to be the issue.
